Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Fabrication Tolerance of InGaAsP/InP-Air-Aperture Micropillar Cavities as 1.55-㎛ Quantum Dot Single-Photon Sources

  • Huang, Shuai (Southwest Institute of Technical Physics) ;
  • Xie, Xiumin (Southwest Institute of Technical Physics) ;
  • Xu, Qiang (Southwest Institute of Technical Physics) ;
  • Zhao, Xinhua (Southwest Institute of Technical Physics) ;
  • Deng, Guangwei (Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China) ;
  • Zhou, Qiang (Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China) ;
  • Wang, You (Southwest Institute of Technical Physics) ;
  • Song, Hai-Zhi (Southwest Institute of Technical Physics)
  • Received : 2020.07.13
  • Accepted : 2020.10.14
  • Published : 2020.12.25
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Abstract

A practical single photon source for fiber-based quantum information processing is still lacking. As a possible 1.55-㎛ quantum-dot single photon source, an InGaAsP/InP-air-aperture micropillar cavity is investigated in terms of fabrication tolerance. By properly modeling the processing uncertainty in layer thickness, layer diameter, surface roughness and the cavity shape distortion, the fabrication imperfection effects on the cavity quality are simulated using a finite-difference time-domain method. It turns out that, the cavity quality is not significantly changing with the processing precision, indicating the robustness against the imperfection of the fabrication processing. Under thickness error of ±2 nm, diameter uncertainty of ±2%, surface roughness of ±2.5 nm, and sidewall inclination of 0.5°, which are all readily available in current material and device fabrication techniques, the cavity quality remains good enough to form highly efficient and coherent 1.55-㎛ single photon sources. It is thus implied that a quantum dot contained InGaAsP/InP-air-aperture micropillar cavity is prospectively a practical candidate for single photon sources applied in a fiber-based quantum information network.

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References

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